Kevin Joseph "KJ" Sawka is an American musician, record producer, and DJ. He plays drums in the bands Pendulum, Destroid and All Fires. Career KJ Sawka started his musical career at the age of twe
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4166ad8332403679d9f66cb13f922edef25b60a5f59b7e9faef716cfe8683e7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360b89ac-40ba-4792-91bf-3aaa70df1dab.json and https://artists.proofprofile.net/proofs/artist/360b89ac-40ba-4792-91bf-3aaa70df1dab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bb75fec4e1a1a8930192b360d6dbe12904944eec03d15c7da4f11e779ea199. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM5LC2300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf841a15e6f2c7056715bfae4c5a533c609fba1ba6b57e250bf526a0955c3159c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDD2210549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40befb07fb39627ba15c37ca1bba252faaf797d5cb71413245c7d0c95c689b06. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM5LC2200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94481fa3c17024fc9e659278fef0d7da8d5ee69268de53ac48aa63c6a3eb29ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM5LC2200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db13c52e3c814676c6fb6ae3272ffadb38b2f8919b6244eedaeecf82ae39777. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2079722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b7a82722818b5cb4d81e5e88c2c068e7dee32935f35da047a3fd73fb236062. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1846763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a9ae211b27312845d0a394f132420860a06cf80c1201e3d96ae8a026286fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1845511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193262e9e84ad790940bfc481252dd09fbde26751b4cd8b64cdaa5e3c948a334. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1846764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a9ae211b27312845d0a394f132420860a06cf80c1201e3d96ae8a026286fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1845511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0186ade2ebdc25923d390aed5aa0ff0e0ddde8c1dbcc494f5f77f0c84e6e15e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1814746.
Don't Leave (It's Gonna Kill Me) [KJ Sawka Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39a4fd059b0e8652349c6c6a2748e34fa49e5972ffa098ad8529095b17ea20f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2538246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a838072b652c2fdf74dc94cee7fce78fd8d9bbf26d57f4c1a9f5075ef4279b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2538249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4604f7172a673178230f9df7ac2806b347964b98d9115bac56b39d850d56d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2565949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485c79fbbcacc804ba803b85c827ebc88bddb20479f577d12a571928d4eae760. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US25X2302147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245eafe8499fc5cfbea203329ff03f5e56330cbcda18d35cdfdde2f0566bf324. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCJY2100220.